Software Watcher

After signing up, you get unlimited storage size. It means you can upload as many as you want. For the file management, it allows you to create folders.

For you who just need to search for certain documents, it has a good categorization to ease your searching. Not to mention the possibility for readers to add tag to what they read. You also can search for documents based on the language used. And if the information you need isn't available yet, there is a request feature to ask for a specific document. Later on, when it is already available, it will be sent directly to your email so you don't have to revisit just for checking its availability.